/* Code for exercise 15.3. |  | "C++ Solutions--Companion to The C++ Programming Language, Third Edition" | by David Vandevoorde; Addison-Wesley 1998; ISBN 0-201-30965-3. | | Permission to use, copy, modify, distribute and sell this software | and its documentation for any purpose is hereby granted without fee. | The author makes no representations about the suitability of this | software for any purpose.  It is provided "as is" without express or | implied warranty. `----------------------------------------------------------------------*/#include "Board.H"#include "VirtualPlayer.H"#include "VirtualTextPlayer.H"namespace { // unnamed namespace   void print_color(std::ostream &output, Color color) {      if (color==kBlack)         output << "Black";      else         output << "White";   }} // end unnamed namespacevoid VirtualTextPlayer::get_move(Board const &board,                                 int &row, int &col) {   VirtualPlayer machine(color_);   machine.get_move(board, row, col);   print_color(output_, color_);   output_ << " plays ["           << char('a'+row-1) << char('1'+col-1) << "]\n";}void VirtualTextPlayer::skip_move(Board const&) {   print_color(output_, color_);   output_ << ": no valid move possible.\n";}void VirtualTextPlayer::win() {   print_color(output_, color_);   output_ << " wins!\n";}void VirtualTextPlayer::tie() {   if (color_==kBlack)      output_ << "Game tied.\n";   else      output_ << "No winner!\n";}